Mammalia of Southern Brazil. loo 
but differs from this species in its longer ears, which are quite as in 
the T.peba, and also in the rounded and not angulate posterior bor- 
der of the head shield, with one and not two rows of scales. The skull 
displays some slight differences from that of the D.peba. One char- 
acter appears to be of value. The pterygoids are produced towards 
the median line, so that their opposing edges are parallel and separ- 
ated by a fissure only, and this fissure is continued on the middle 
line into the palatine bone for a distance of nearly 2 mm. In all of 
my numerous skulls of T. peba, the pterygoid borders are either 
divergent or are separated by a wide space, and the palatines are 
not notched posteriorly. The palate is flat, with the borders rounded, 
and not recurved. 
A single specimen with skeleton from Chapada. 
24- J5CIURUS /ESTUANS Lmn. 
One skin with skeleton, one with skull, and one entire skeleton, 
-5- SciURus VARIABILIS Gcoff. var Langsdorffii Natt. 
Four skins with skeletons, four skins with skulls, nine separate 
skins, and four separate skulls, all from Chapada. 
^Ir. J. A. Allen refers the S. langsdorffii oi Natterer to this species 
as a color variety. All of the above seventeen skins are identical in 
color, showing that if it is but a variety, it is very constant in this 
locality. I may add that of the eleven skulls of the collection, all 
have but one superior premolar, and not two as given by Mr. Allen 
for the S. variabilis. 
MURID^. 
26. Cricetus sp. 
Chapada. 
27. Cricetus sp. 
Chapada. 
28. Cricetus sp. 
Chapada. 
29- Cricetus sp. 
Sao Joao. 
